/* Id */

/*
 * Copyright (c) 1988-1997 Sam Leffler
 * Copyright (c) 1991-1997 Silicon Graphics, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software and 
 * its documentation for any purpose is hereby granted without fee, provided
 * that (i) the above copyright notices and this permission notice appear in
 * all copies of the software and related documentation, and (ii) the names of
 * Sam Leffler and Silicon Graphics may not be used in any advertising or
 * publicity relating to the software without the specific, prior written
 * permission of Sam Leffler and Silicon Graphics.
 * 
 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 
 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 
 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  
 * 
 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 
 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
 * OF THIS SOFTWARE.
 */

#ifndef _TIFFDIR_
#define _TIFFDIR_
/*
 * ``Library-private'' Directory-related Definitions.
 */

/*
 * Internal format of a TIFF directory entry.
 */
typedef struct {
#define FIELD_SETLONGS  4
        /* bit vector of fields that are set */
        unsigned long   td_fieldsset[FIELD_SETLONGS];

        uint32  td_imagewidth, td_imagelength, td_imagedepth;
        uint32  td_tilewidth, td_tilelength, td_tiledepth;
        uint32  td_subfiletype;
        uint16  td_bitspersample;
        uint16  td_sampleformat;
        uint16  td_compression;
        uint16  td_photometric;
        uint16  td_threshholding;
        uint16  td_fillorder;
        uint16  td_orientation;
        uint16  td_samplesperpixel;
        uint32  td_rowsperstrip;
        uint16  td_minsamplevalue, td_maxsamplevalue;
        double  td_sminsamplevalue, td_smaxsamplevalue;
        float   td_xresolution, td_yresolution;
        uint16  td_resolutionunit;
        uint16  td_planarconfig;
        float   td_xposition, td_yposition;
        uint16  td_pagenumber[2];
        uint16* td_colormap[3];
        uint16  td_halftonehints[2];
        uint16  td_extrasamples;
        uint16* td_sampleinfo;
        tstrip_t td_stripsperimage;
        tstrip_t td_nstrips;            /* size of offset & bytecount arrays */
        uint32* td_stripoffset;
        uint32* td_stripbytecount;
        int     td_stripbytecountsorted; /* is the bytecount array sorted ascending? */
        uint16  td_nsubifd;
        uint32* td_subifd;
        /* YCbCr parameters */
        uint16  td_ycbcrsubsampling[2];
        uint16  td_ycbcrpositioning;
        /* Colorimetry parameters */
        uint16* td_transferfunction[3];
        /* CMYK parameters */
        int     td_inknameslen;
        char*   td_inknames;

        int     td_customValueCount;
        TIFFTagValue *td_customValues;
} TIFFDirectory;

/*
 * Field flags used to indicate fields that have
 * been set in a directory, and to reference fields
 * when manipulating a directory.
 */

/*
 * FIELD_IGNORE is used to signify tags that are to
 * be processed but otherwise ignored.  This permits
 * antiquated tags to be quietly read and discarded.
 * Note that a bit *is* allocated for ignored tags;
 * this is understood by the directory reading logic
 * which uses this fact to avoid special-case handling
 */ 
#define FIELD_IGNORE                    0

/* multi-item fields */
#define FIELD_IMAGEDIMENSIONS           1
#define FIELD_TILEDIMENSIONS            2
#define FIELD_RESOLUTION                3
#define FIELD_POSITION                  4

/* single-item fields */
#define FIELD_SUBFILETYPE               5
#define FIELD_BITSPERSAMPLE             6
#define FIELD_COMPRESSION               7
#define FIELD_PHOTOMETRIC               8
#define FIELD_THRESHHOLDING             9
#define FIELD_FILLORDER                 10
#define FIELD_ORIENTATION               15
#define FIELD_SAMPLESPERPIXEL           16
#define FIELD_ROWSPERSTRIP              17
#define FIELD_MINSAMPLEVALUE            18
#define FIELD_MAXSAMPLEVALUE            19
#define FIELD_PLANARCONFIG              20
#define FIELD_RESOLUTIONUNIT            22
#define FIELD_PAGENUMBER                23
#define FIELD_STRIPBYTECOUNTS           24
#define FIELD_STRIPOFFSETS              25
#define FIELD_COLORMAP                  26
#define FIELD_EXTRASAMPLES              31
#define FIELD_SAMPLEFORMAT              32
#define FIELD_SMINSAMPLEVALUE           33
#define FIELD_SMAXSAMPLEVALUE           34
#define FIELD_IMAGEDEPTH                35
#define FIELD_TILEDEPTH                 36
#define FIELD_HALFTONEHINTS             37
#define FIELD_YCBCRSUBSAMPLING          39
#define FIELD_YCBCRPOSITIONING          40
#define FIELD_TRANSFERFUNCTION          44
#define FIELD_INKNAMES                  46
#define FIELD_SUBIFD                    49
/*      FIELD_CUSTOM (see tiffio.h)     65 */
/* end of support for well-known tags; codec-private tags follow */
#define FIELD_CODEC                     66      /* base of codec-private tags */


/*
 * Pseudo-tags don't normally need field bits since they
 * are not written to an output file (by definition).
 * The library also has express logic to always query a
 * codec for a pseudo-tag so allocating a field bit for
 * one is a waste.   If codec wants to promote the notion
 * of a pseudo-tag being ``set'' or ``unset'' then it can
 * do using internal state flags without polluting the
 * field bit space defined for real tags.
 */
#define FIELD_PSEUDO                    0

#define FIELD_LAST                      (32*FIELD_SETLONGS-1)

#define TIFFExtractData(tif, type, v) \
    ((uint32) ((tif)->tif_header.tiff_magic == TIFF_BIGENDIAN ? \
        ((v) >> (tif)->tif_typeshift[type]) & (tif)->tif_typemask[type] : \
        (v) & (tif)->tif_typemask[type]))
#define TIFFInsertData(tif, type, v) \
    ((uint32) ((tif)->tif_header.tiff_magic == TIFF_BIGENDIAN ? \
        ((v) & (tif)->tif_typemask[type]) << (tif)->tif_typeshift[type] : \
        (v) & (tif)->tif_typemask[type]))


#define BITn(n)                         (((unsigned long)1L)<<((n)&0x1f)) 
#define BITFIELDn(tif, n)               ((tif)->tif_dir.td_fieldsset[(n)/32]) 
#define TIFFFieldSet(tif, field)        (BITFIELDn(tif, field) & BITn(field)) 
#define TIFFSetFieldBit(tif, field)     (BITFIELDn(tif, field) |= BITn(field))
#define TIFFClrFieldBit(tif, field)     (BITFIELDn(tif, field) &= ~BITn(field))

#define FieldSet(fields, f)             (fields[(f)/32] & BITn(f))
#define ResetFieldBit(fields, f)        (fields[(f)/32] &= ~BITn(f))

#if defined(__cplusplus)
extern "C" {
#endif
extern  const TIFFFieldInfo *_TIFFGetFieldInfo(size_t *);
extern  const TIFFFieldInfo *_TIFFGetExifFieldInfo(size_t *);
extern  void _TIFFSetupFieldInfo(TIFF*, const TIFFFieldInfo[], size_t);
extern  void _TIFFPrintFieldInfo(TIFF*, FILE*);
extern  TIFFDataType _TIFFSampleToTagType(TIFF*);
extern  const TIFFFieldInfo* _TIFFFindOrRegisterFieldInfo( TIFF *tif,
                                                           ttag_t tag,
                                                           TIFFDataType dt );
extern  TIFFFieldInfo* _TIFFCreateAnonFieldInfo( TIFF *tif, ttag_t tag,
                                                 TIFFDataType dt );

#define _TIFFMergeFieldInfo         vtk_TIFFMergeFieldInfo
#define _TIFFFindFieldInfo          vtk_TIFFFindFieldInfo
#define _TIFFFindFieldInfoByName    vtk_TIFFFindFieldInfoByName
#define _TIFFFieldWithTag           vtk_TIFFFieldWithTag
#define _TIFFFieldWithName          vtk_TIFFFieldWithName

#if defined(__cplusplus)
}
#endif
#endif /* _TIFFDIR_ */

/* vim: set ts=8 sts=8 sw=8 noet: */
